Hydrodynamics of an FCC riser using energy minimization multiscale drag model
In this study, a structured-based drag was derived using the energy minimization multiscale (EMMS) model, and used to carry out computational fluid dynamics (CFD) simulations for low and high solid flux fluid catalytic cracking (FCC) risers. The results were compared with those using the Gidaspow dr...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Published: |
Elsevier BV
2011
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| Online Access: | http://hdl.handle.net/20.500.11937/13281 |
| _version_ | 1848748305424580608 |
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| author | Shah, Milinkumar Utikar, Ranjeet Tade, Moses Pareek, Vishnu |
| author_facet | Shah, Milinkumar Utikar, Ranjeet Tade, Moses Pareek, Vishnu |
| author_sort | Shah, Milinkumar |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | In this study, a structured-based drag was derived using the energy minimization multiscale (EMMS) model, and used to carry out computational fluid dynamics (CFD) simulations for low and high solid flux fluid catalytic cracking (FCC) risers. The results were compared with those using the Gidaspow drag model, as well as experimental data and previous simulation results. Initially, the EMMS model was solved for two flow conditions and the correlations for the drag coefficients were derived, which were then used to simulate 2D domain of the risers. The time-averaged axial and radial profiles of voidages and pressured drop were compared with the experimental data. The comparison showed that only EMMS model was able to capture the axial heterogeneity with the dense bottom and dilute top sections. The radial profiles using both drag models showed only qualitative agreement with the experimental data. The results using the EMMS and Gidaspow drag model showed a reasonable agreement near the wall and the centre, respectively. Thus, it was concluded that the EMMS model was able to predict both axial and radial heterogeneity for both flow conditions, but only qualitatively; however, further improvements are required to achieve quantitative agreement with the experimental data. |
| first_indexed | 2025-11-14T07:02:56Z |
| format | Journal Article |
| id | curtin-20.500.11937-13281 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:02:56Z |
| publishDate | 2011 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-132812017-09-13T14:59:18Z Hydrodynamics of an FCC riser using energy minimization multiscale drag model Shah, Milinkumar Utikar, Ranjeet Tade, Moses Pareek, Vishnu Drag models EMMS Gas–solid Gidaspow CFD Riser In this study, a structured-based drag was derived using the energy minimization multiscale (EMMS) model, and used to carry out computational fluid dynamics (CFD) simulations for low and high solid flux fluid catalytic cracking (FCC) risers. The results were compared with those using the Gidaspow drag model, as well as experimental data and previous simulation results. Initially, the EMMS model was solved for two flow conditions and the correlations for the drag coefficients were derived, which were then used to simulate 2D domain of the risers. The time-averaged axial and radial profiles of voidages and pressured drop were compared with the experimental data. The comparison showed that only EMMS model was able to capture the axial heterogeneity with the dense bottom and dilute top sections. The radial profiles using both drag models showed only qualitative agreement with the experimental data. The results using the EMMS and Gidaspow drag model showed a reasonable agreement near the wall and the centre, respectively. Thus, it was concluded that the EMMS model was able to predict both axial and radial heterogeneity for both flow conditions, but only qualitatively; however, further improvements are required to achieve quantitative agreement with the experimental data. 2011 Journal Article http://hdl.handle.net/20.500.11937/13281 10.1016/j.cej.2011.01.076 Elsevier BV restricted |
| spellingShingle | Drag models EMMS Gas–solid Gidaspow CFD Riser Shah, Milinkumar Utikar, Ranjeet Tade, Moses Pareek, Vishnu Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title | Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title_full | Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title_fullStr | Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title_full_unstemmed | Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title_short | Hydrodynamics of an FCC riser using energy minimization multiscale drag model |
| title_sort | hydrodynamics of an fcc riser using energy minimization multiscale drag model |
| topic | Drag models EMMS Gas–solid Gidaspow CFD Riser |
| url | http://hdl.handle.net/20.500.11937/13281 |